Cannes, France – It requires a certain amount of cinematic gear-shifting to jump from film to film here at the Cannes Film Fes¬tival. During the last few days, for example, I’ve seen Federico Fellini’s bizarre new study of feminism, Bertrand Tavernier’s thoughtful portrait of a young schoolteacher in Lyon, a Canadian thriller named “Double Negative,” and the British punk rock heroes, the Sex Pistols, in “The Great Rock and Roll Swindle.”